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This registry entry is available when you use the Vibration Free Transmission (VFT) calibration procedure and algorithms to calibrate an analog probe. This registry entry is not available on all machine types. You can use this registry entry on machines that support VFT when the Use Trax Calibration check box in the PC-DMIS Probe Utilities dialog box (Insert | Hardware Definition | Probe) is NOT selected. The VFT procedure includes both individual touch measurement and scan measurement. This entry applies to the scans. The VFT scan paths are executed twice with two different sets of scanning parameters.